Math & Science ⇒ Letter proportional to Formula

[financialwar]

I have the above formula, but the "r" on the bottom seem is normal size and compared to the rest of the formula it is too small.

Code: Select all

\[
  PV=PMT\left[\dfrac{(1+r)\left[\dfrac{1-(1+r)^{-n}}{r}\right]-n(1+r)^{-n}}{r}\right]
\]

Is there a way to make it more proportional to the rest of the formula?

[Stefan Kottwitz]

You can make it bigger using \mathlarger of the relsize package. It can be nested for even larger sizes, such as

Code: Select all

\[
  PV=PMT\left[\dfrac{(1+r)\left[\dfrac{1-(1+r)^{-n}}{r}\right]
    -n(1+r)^{-n}}{\mathlarger{\mathlarger{r}}}\right]
\]

However, perhaps you would like to change the vertical centering of the fraction within the brackets to get smaller brackets.

Stefan